Empty Map

---

examples/map/map.go

package main

import "fmt"

func main() {
    grades := map[string]int{}
    fmt.Printf("%T\n", grades)

    grades["Mary"] = 99
    grades["Jane"] = 88
    grades["Bob"] = 93

    fmt.Println(grades)

    grade := grades["Jane"]
    fmt.Println(grade)
}